Undergraduate students' conceptions of enthalpy, enthalpy change and related concepts
نویسندگان
چکیده
منابع مشابه
The Enthalpy Change on Adenosine Triphosphate
The energetics of ATP’ hydrolysis to ADP and P have been studied previously by combining either thermal (1, 2) or free energy (3-6) data for a number of chemical reactions according to the usual procedures of chemical thermodynamics. Such calculations, however, suffer from the fact that the uncertainties in each measurement are compounded in the final result. The ATPase properties of myosin off...
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15 صفحه اولSurface Enthalpy of Boehmite
Abs t rac t -The persistence of many seemingly metastable mineral assemblages in sediments and soils is commonly attributed to their sluggish transformation to the stable-phase assemblage. Although undoubtedly kinetics plays a major role, this study shows that thermodynamic factors, particularly surface energy, significantly influence the free energy. Enthalpies of formation of boehmite samples...
متن کاملNuclear asymmetry enthalpy
Recent work has sought to extract the asymmetry energy at very low density from observables in heavyion collisions. The logic employed starts from the assumption that the fragment yields are determined by a minimization of the Helmholtz free energy. As volume is in reality unconstrained, nor can a single freeze-out volume be expected, the physical relevance of the Helmholtz free energy must be ...
متن کاملThe enthalpy change for the reduction of nicotinamide--adenine dinucleotide.
The heat of the reaction NAD(+)+propan-2-ol=NADH+acetone+H(+) was determined to be 42.5+/-0.6kJ/mol (10.17+/-0.15kcal/mol) from equilibrium measurements at 9-42 degrees C catalysed by yeast alcohol dehydrogenase. With the aid of thermochemical data for acetone and propan-2-ol the values of DeltaH=-29.2kJ/mol (-6.99kcal/mol) and DeltaG(0)=22.1kJ/mol (5.28kcal/mol) are derived for the reduction o...
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ژورنال
عنوان ژورنال: Chem. Educ. Res. Pract.
سال: 2014
ISSN: 1109-4028,1756-1108
DOI: 10.1039/c2rp20135f